Power-low expansion in k-essence cosmology

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We study spatially flat isotropic universes driven by k-essence. It is shown that Friedmann and k-field equations may be analytically integrated for arbitrary k-field potentials during evolution with a constant baryotropic index. It follows that there is an infinite number of dynamically different k...

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Detalles Bibliográficos
Autor principal: Chimento, L.P
Otros Autores: Feinstein, A.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2004
Acceso en línea:Registro en Scopus
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Registro en la Biblioteca Digital
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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030 |a MPLAE 
100 1 |a Chimento, L.P. 
245 1 0 |a Power-low expansion in k-essence cosmology 
260 |c 2004 
270 1 0 |m Chimento, L.P.; Dpto. de Física, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina; email: chimento@uba.de.ar 
506 |2 openaire  |e Política editorial 
504 |a Armendariz-Picon, C., Mukhanov, V., Steinhardt, P.J., (2001) Phys. Rev., D63, p. 103510 
504 |a Armendariz-Picon, C., Mukhanov, V., Steinhardt, P.J., (2000) Phys. Rev. Lett., 85, p. 4438 
504 |a Chiba, T., Okabe, T., Yamaguchi, M., (2000) Phys. Rev., D62, p. 023511 
504 |a Malquarti, M., Copeland, E.J., Liddle, A.R., Trodden, M., A New View of K-Essence, , astro-ph/0302279 
504 |a Armendariz-Picon, C., Damour, T., Mukhanov, V., (1999) Phys. Lett., B458, p. 209 
504 |a Quevedo, F., (2002) Class. Quantum Grav., 19, p. 5721 
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504 |a Caldwell, R.R., (2002) Phys. Lett., B545, p. 23 
504 |a Boisseau, B., Esposito-Farese, G., Polarski, D., Starobinsky, A.A., (2000) Phys. Rev. Lett., 85, p. 2236 
504 |a Faraoni, V., (2002) Int. J. Mod. Phys., D11, p. 471 
504 |a Parker, L., Raval, A., (1999) Phys. Rev., D60, p. 123502 
504 |a (2003) Phys. Rev., D67. , 029902E 
504 |a Maor, I., Brustein, R., McMahon, J., Steinhardt, P.J., (2002) Phys. Rev., D65, p. 123003 
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504 |a Ratra, B., Peebles, P.J.E., (1988) Phys. Rev., D37, p. 3406 
504 |a Copeland, E.J., Liddle, A.R., Wands, D., (1993) Ann. N.Y. Acad. Sci., 688, p. 647 
504 |a Caldwell, R.R., Dave, R., Steinhardt, P.J., (1998) Phys. Rev. Lett., 80, p. 1582 
504 |a Ferreira, P.G., Joyce, M., (1998) Phys. Rev., D58, p. 023503 
504 |a Copeland, E.J., Liddle, A.R., Wands, D., (1998) Phys. Rev., D57, p. 4686 
504 |a Liddle, A.R., Scherrer, R.J., (1999) Phys. Rev., D59, p. 023509 
504 |a Sahni, V., Starobinsky, A., (2000) Int. J. Mod. Phys., D9, p. 373 
504 |a Malquarti, M., Copeland, E.J., Liddle, A.R., K-Essence and the Coincidence Problem, , astro-ph/0304277 
520 3 |a We study spatially flat isotropic universes driven by k-essence. It is shown that Friedmann and k-field equations may be analytically integrated for arbitrary k-field potentials during evolution with a constant baryotropic index. It follows that there is an infinite number of dynamically different k-theories with equivalent kinematics of the gravitational field. We show that there is a large "window" of stable solutions, and that the dust-like behavior separates stable from unstable expansion. Restricting to the family of power law solutions, it is argued that the linear scalar field model, with constant function F, is isomorphic to a model with divergent speed of sound and this makes them less suitable for cosmological modeling than the nonlinear k-field solutions we find in this paper.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires, X223 
536 |a Detalles de la financiación: 1/CI-CYT 00172 
536 |a Detalles de la financiación: Euskal Herriko Unibertsitatea, 9/UPV00172.310-14456/2002 
536 |a Detalles de la financiación: This work was supported by the University of Buenos Aires under Project X223. A.F. acknowledges the support of the University of the Basque Country Grants 9/UPV00172.310-14456/2002, and the Spanish Science Ministry Grant 1/CI-CYT 00172. 310-0018-12205/2000. L.P.C. is a fellow of the Consejo Nacional de Investi-gaciones Científicas y Técnicas. 
593 |a Dpto. de Física, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina 
593 |a Dpto. de Fisica Teorica, Universidad del País Vasco, Apdo. 644, 48080, Bilbao, Spain 
690 1 0 |a COSMOLOGY 
690 1 0 |a GENERAL RELATIVITY 
690 1 0 |a K-ESSENCE 
690 1 0 |a ARTICLE 
690 1 0 |a COSMOS 
690 1 0 |a EVOLUTION 
690 1 0 |a GRAVITY 
690 1 0 |a HYDRODYNAMICS 
690 1 0 |a MATHEMATICAL MODEL 
690 1 0 |a PHENOMENOLOGY 
690 1 0 |a QUANTUM THEORY 
700 1 |a Feinstein, A. 
773 0 |d 2004  |g v. 19  |h pp. 761-768  |k n. 10  |p Mod. Phys. Lett. A  |x 02177323  |w (AR-BaUEN)CENRE-599  |t Modern Physics Letters A 
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856 4 0 |u https://doi.org/10.1142/S0217732304013507  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_02177323_v19_n10_p761_Chimento  |y Handle 
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